...
The PDF is being proxied (when it shouldn’t be) or not proxied (when it should).
Quicklink is going to incorrect publisher
Quicklink is not working - broken link
...
Springer Nature Debug links:
Springer has provided two debug links to test access and linking issues for both Springer and Nature.
Open a case with with Springer if there are issues with access journals or articles:
If you are still experiencing this problem, and have not already done so, please provide us with a hyperlink to the content you cannot access along with a screenshot of the results of clicking on the appropriate debug link below.
The debug results will give us the information needed to determine if the cause of the issue is your access setup.
Springer Content: https://idp.springer.com/debug
Nature Content: https://idp.nature.com/debug